Before and After

before oneafter one
before twoafter two
before threeafter three
before fourafter four
before fiveafter five
before sixafter six
before sevenafter seven
before eightafter eight
before nineafter nine
before tenafter ten
before elevenafter eleven
before twelveaftertwelve
before thirteenafter thirteen
before fourteenafter fourteen
before fiveteenafter fiveteen
before sixteenafter sixteen
before seventeenafter seventeen
before eighteenafter eighteen
before twentyafter twenty
before twenty oneafter twenty one